From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC/PATCH v4 4/7] ARM: ARM11 MPCore: clean_dcache_area is not preempt safe
Date: Tue, 18 Oct 2011 10:43:19 -0700 [thread overview]
Message-ID: <20111018174319.GE27515@atomide.com> (raw)
In-Reply-To: <F772D91A-6D3A-40F4-ABF5-59C42FD2606E@mvista.com>
* George G. Davis <gdavis@mvista.com> [111018 09:56]:
> Hello Tony/Ohad,
>
> On Oct 18, 2011, at 1:08 PM, Tony Lindgren wrote:
>
> > Hi,
> >
> > * gdavis at mvista.com <gdavis@mvista.com> [111018 06:13]:
> >> From: George G. Davis <gdavis@mvista.com>
> >>
> >> If preemption and subsequent task migration occurs during calls to
> >> clean_dcache_area on ARM11 MPCore machines, global memory state
> >> can become inconsistent. To prevent inconsistent memory state on
> >> these machines, disable preemption in callers of these functions
> >> around memory modifications and subsequent clean_dcache_area calls.
> >
> > This one needs to be refreshed against what's queued in for-next as
> > Ohad has moved most of the iommu code into drivers. I've added
> > Ohad to Cc as well.
>
> If you do not use ARM11 MPCore with those drivers, then we can drop this altogether.
No MPCore omaps available AFAIK, so that sounds OK to me.
Tony
next prev parent reply other threads:[~2011-10-18 17:43 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-20 13:43 parallel load of modules on an ARM multicore EXTERNAL Waechtler Peter (Fa. TCP, CM-AI/PJ-CF31)
2011-06-21 15:50 ` Catalin Marinas
2011-06-23 14:39 ` AW: " EXTERNAL Waechtler Peter (Fa. TCP, CM-AI/PJ-CF31)
2011-06-23 14:52 ` Catalin Marinas
2011-06-23 15:12 ` Russell King - ARM Linux
2011-06-23 15:34 ` Catalin Marinas
2011-06-23 17:02 ` Catalin Marinas
2011-06-23 15:20 ` AW: " EXTERNAL Waechtler Peter (Fa. TCP, CM-AI/PJ-CF31)
2011-07-07 4:25 ` George G. Davis
2011-10-20 4:04 ` George G. Davis
2011-09-22 7:29 ` George G. Davis
2011-09-22 8:52 ` Catalin Marinas
2011-10-06 4:29 ` George G. Davis
2011-10-06 5:08 ` [RFC/PATCH 0/7] ARM: ARM11 MPCore preemption/task migration cache coherency fixups gdavis at mvista.com
2011-10-06 5:08 ` [RFC/PATCH 1/7] ARM: ARM11 MPCore: pgd_alloc is not preempt safe gdavis at mvista.com
2011-10-06 16:35 ` Russell King - ARM Linux
2011-10-06 19:38 ` George G. Davis
2011-10-06 5:08 ` [RFC/PATCH 2/7] ARM: ARM11 MPCore: pte_alloc_one{, _kernel} are " gdavis at mvista.com
2011-10-06 5:08 ` [RFC/PATCH 3/7] ARM: ARM11 MPCore: {clean, flush}_pmd_entry " gdavis at mvista.com
2011-10-06 5:08 ` [RFC/PATCH 4/7] ARM: ARM11 MPCore: clean_dcache_area is " gdavis at mvista.com
2011-10-06 5:08 ` [RFC/PATCH 5/7] ARM: Move get_thread_info macro definition to <asm/assembler.h> gdavis at mvista.com
2011-10-06 5:08 ` [RFC/PATCH 6/7] ARM: ARM11 MPCore: DMA_CACHE_RWFO operations are not preempt safe gdavis at mvista.com
2011-10-06 16:40 ` Russell King - ARM Linux
2011-10-06 19:41 ` George G. Davis
2011-10-06 5:08 ` [RFC/PATCH 7/7] ARM: ARM11 MPCore: cpu_v6_set_pte_ext is " gdavis at mvista.com
2011-10-06 7:46 ` Russell King - ARM Linux
2011-10-06 12:35 ` George G. Davis
2011-10-07 2:38 ` [RFC/PATCH v2 0/7] ARM11 MPCore: preemption/task migration cache coherency fixups gdavis at mvista.com
2011-10-07 2:38 ` [RFC/PATCH 1/7] ARM: ARM11 MPCore: pgd_alloc is not preempt safe gdavis at mvista.com
2011-10-07 2:38 ` [RFC/PATCH 2/7] ARM: ARM11 MPCore: pte_alloc_one{, _kernel} are " gdavis at mvista.com
2011-10-07 7:47 ` [RFC/PATCH 2/7] ARM: ARM11 MPCore: pte_alloc_one{,_kernel} " Russell King - ARM Linux
2011-10-07 15:31 ` [RFC/PATCH 2/7] ARM: ARM11 MPCore: pte_alloc_one{, _kernel} " George G. Davis
2011-10-07 2:38 ` [RFC/PATCH 3/7] ARM: ARM11 MPCore: {clean, flush}_pmd_entry " gdavis at mvista.com
2011-10-11 9:53 ` [RFC/PATCH 3/7] ARM: ARM11 MPCore: {clean,flush}_pmd_entry " Catalin Marinas
2011-10-12 2:34 ` [RFC/PATCH 3/7] ARM: ARM11 MPCore: {clean, flush}_pmd_entry " George G. Davis
2011-10-13 14:31 ` [RFC/PATCH 3/7] ARM: ARM11 MPCore: {clean,flush}_pmd_entry " Russell King - ARM Linux
2011-10-14 1:34 ` [RFC/PATCH 3/7] ARM: ARM11 MPCore: {clean, flush}_pmd_entry " George G. Davis
2011-10-07 2:38 ` [RFC/PATCH 4/7] ARM: ARM11 MPCore: clean_dcache_area is " gdavis at mvista.com
2011-10-07 2:38 ` [RFC/PATCH 5/7] ARM: Move get_thread_info macro definition to <asm/assembler.h> gdavis at mvista.com
2011-10-11 9:56 ` Catalin Marinas
2011-10-12 6:04 ` gdavis at mvista.com
2011-10-13 14:34 ` Russell King - ARM Linux
2011-10-13 14:49 ` Catalin Marinas
2011-10-13 14:53 ` Russell King - ARM Linux
2011-10-14 1:46 ` George G. Davis
2011-10-14 1:44 ` George G. Davis
2011-10-14 1:42 ` George G. Davis
2011-10-14 2:54 ` Nicolas Pitre
2011-10-14 12:56 ` George G. Davis
2011-10-07 2:38 ` [RFC/PATCH 6/7] ARM: ARM11 MPCore: DMA_CACHE_RWFO operations are not preempt safe gdavis at mvista.com
2011-10-07 2:38 ` [RFC/PATCH 7/7] ARM: ARM11 MPCore: cpu_v6_set_pte_ext is " gdavis at mvista.com
2011-10-07 16:26 ` [RFC/PATCH v3 0/7] ARM11 MPCore: preemption/task migration cache coherency fixups gdavis at mvista.com
2011-10-07 16:26 ` [RFC/PATCH v3 1/7] ARM: ARM11 MPCore: pgd_alloc is not preempt safe gdavis at mvista.com
2011-10-07 16:26 ` [RFC/PATCH v3 2/7] ARM: ARM11 MPCore: pte_alloc_one{, _kernel} are " gdavis at mvista.com
2011-10-07 16:26 ` [RFC/PATCH v3 3/7] ARM: ARM11 MPCore: {clean, flush}_pmd_entry " gdavis at mvista.com
2011-10-07 16:26 ` [RFC/PATCH v3 4/7] ARM: ARM11 MPCore: clean_dcache_area is " gdavis at mvista.com
2011-10-07 16:26 ` [RFC/PATCH v3 5/7] ARM: Move get_thread_info macro definition to <asm/assembler.h> gdavis at mvista.com
2011-10-07 16:26 ` [RFC/PATCH v3 6/7] ARM: ARM11 MPCore: DMA_CACHE_RWFO operations are not preempt safe gdavis at mvista.com
2011-10-07 16:26 ` [RFC/PATCH v3 7/7] ARM: ARM11 MPCore: cpu_v6_set_pte_ext is " gdavis at mvista.com
2011-10-18 13:47 ` [RFC/PATCH v4 0/7] ARM11 MPCore: preemption/task migration cache coherency fixups gdavis at mvista.com
2011-10-18 13:47 ` [RFC/PATCH v4 1/7] ARM: ARM11 MPCore: pgd_alloc is not preempt safe gdavis at mvista.com
2011-10-18 13:47 ` [RFC/PATCH v4 2/7] ARM: ARM11 MPCore: pte_alloc_one{, _kernel} are " gdavis at mvista.com
2011-10-18 13:47 ` [RFC/PATCH v4 3/7] ARM: ARM11 MPCore: {clean, flush}_pmd_entry " gdavis at mvista.com
2011-10-18 13:47 ` [RFC/PATCH v4 4/7] ARM: ARM11 MPCore: clean_dcache_area is " gdavis at mvista.com
2011-10-18 17:08 ` Tony Lindgren
2011-10-18 17:30 ` George G. Davis
2011-10-18 17:43 ` Tony Lindgren [this message]
2011-10-18 18:13 ` George G. Davis
2011-10-18 13:47 ` [RFC/PATCH v4 5/7] ARM: Move get_thread_info macro definition to <asm/assembler.h> gdavis at mvista.com
2011-10-18 13:47 ` [RFC/PATCH v4 6/7] ARM: ARM11 MPCore: DMA_CACHE_RWFO operations are not preempt safe gdavis at mvista.com
2011-10-18 21:28 ` Nicolas Pitre
2011-10-18 23:26 ` George G. Davis
2011-10-19 1:09 ` Nicolas Pitre
2011-10-18 13:47 ` [RFC/PATCH v4 7/7] ARM: ARM11 MPCore: cpu_v6_set_pte_ext is " gdavis at mvista.com
2011-10-18 21:52 ` Nicolas Pitre
2011-10-18 23:29 ` George G. Davis
2012-06-12 20:40 ` [RFC/PATCH v5 0/7] ARM11 MPCore: preemption/task migration cache coherency fixups gdavis at mvista.com
2012-06-12 20:40 ` [RFC/PATCH v5 1/7] ARM: ARM11 MPCore: Make pgd_alloc preempt safe gdavis at mvista.com
2012-06-12 20:40 ` [RFC/PATCH v5 2/7] ARM: ARM11 MPCore: Make pte_alloc_one{, _kernel} " gdavis at mvista.com
2012-06-12 20:40 ` [RFC/PATCH v5 3/7] ARM: ARM11 MPCore: Make {clean, flush}_pmd_entry " gdavis at mvista.com
2012-06-12 20:40 ` [RFC/PATCH v5 4/7] ARM: Move get_thread_info macro definition to <asm/assembler.h> gdavis at mvista.com
2012-06-12 20:40 ` [RFC/PATCH v5 5/7] ARM: ARM11 MPCore: cpu_v6_dcache_clean_area needs RFO gdavis at mvista.com
2012-06-13 9:32 ` Catalin Marinas
2012-06-13 9:36 ` Russell King - ARM Linux
2012-06-13 9:41 ` Catalin Marinas
2012-06-13 9:45 ` Russell King - ARM Linux
2012-06-13 9:54 ` Catalin Marinas
2012-06-13 11:36 ` George G. Davis
2012-06-13 11:21 ` George G. Davis
2012-06-12 20:40 ` [RFC/PATCH v5 6/7] ARM: ARM11 MPCore: Make DMA_CACHE_RWFO operations preempt safe gdavis at mvista.com
2012-06-12 20:40 ` [RFC/PATCH v5 7/7] ARM: ARM11 MPCore: Make cpu_v6_set_pte_ext " gdavis at mvista.com
2012-06-13 9:34 ` Catalin Marinas
2012-06-13 11:35 ` George G. Davis
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